CV4F steel
Cr4 °F Steel
XV4 °F Steel: Handbook of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperature, physical, mechanical, technological and foundry properties for the brand — Steel XV4 °F.
General information on steel XV4F
| Kind of delivery |
| Sections, including shaped: GOST 5950−73, GOST 2590−71, GOST 2591−71. Calibrated bar GOST 5950−73, GOST 7417−75, GOST 8559−75, GOST 8560−78. Grinded rod and silversilver GOST 8950−73, GOST 14955−77. Strip GOST 4405−75. Forgings and forged blanks GOST 5950−73, GOST 1133−71, GOST 7831−78. |
| Application |
| Cutters and milling cutters when processing hard metals with low cutting speed (rolls with hardened surface), engraving cutters for very hard work, piercing poisons, etc. |
Chemical composition of steel CHV4F
| Chemical element |
% |
| Vanadium (V) |
0.15−0.30 |
| Tungsten (W) |
3.50−4.30 |
| Silicon (Si) |
0.15−0.35 |
| Manganese (Mn) |
0.15−0.40 |
| Copper (Cu), not more |
0.30 |
| Molybdenum (Mo), max. |
0.50 |
| Nickel (Ni), not more than |
0.35 |
| Sulfur (S), not more than |
0.030 |
| Carbon (C) |
1.25−1.45 |
| Phosphorus (P), not more than |
0.030 |
| Chromium (Cr) |
0.40−0.70 |
Process properties of Cr4 °F steel
| Forging temperature |
| The beginning 1100, the end 870. Cooling in the stacks. |
| Weldability |
| Not applicable for welded structures. |
| Tendency to temperability |
| Slightly inclined |
| Grindability |
| good |
XB4 °F steel critical point temperature
| Critical point |
°С |
| Ac1 |
750−760 |
Hardness of steel KhV4F
| Delivery condition, heat treatment regime |
HRCe surface |
HB |
| Rings and strips annealed or high-temperatured |
|
255 |
| Samples. Hardened 800−820 C, water. |
St. 66 |
|
| Isothermal annealing at 800−820 C, cooling at 50 deg/h to 600 C, 2−3 h, cooling at 50 deg/h to 550 C, air. |
|
285 |
| Heating at 600−650 C. Hardening at 830−850 C, oil. Tempering 140−170 C, air (final heat treatment mode) |
63−68 |
|
| Tempering at 800 °C with water. Tempering at 100 C. |
67 |
|
| Hardening 800 C, water. Tempering 200 C. |
65 |
|
| Tempering at 800 °C with water. Tempering 300 C. |
64 |
|
